Shelter



FIG. 1 is a perspective view of a shelter showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a perspective view of a modified form of the shelter of FIG.1; and _

FIG. 7 is a perspective view of a further modified form of the shelterof FIG. 1.

The ornamental design for a shelter, as shown and described.